Merge pull request clawpack#64 from rjleveque/dtdx1d_maxm

Fix declared dimension of dtdx1d and dtdy1d in dimsp2.f

Merge pull request clawpack#64 from rjleveque/dtdx1d_maxm

Fix declared dimension of dtdx1d and dtdy1d in dimsp2.f

Merge pull request clawpack#63 from rjleveque/fix-for-5.2.0

Fix for 5.2.0

5.1.0 release